all the sectarians who admired this spiritual hierarchy considered, under the relations peculiar to them, the different beings of which it was composed. The Persian magians who saw there genii, more or less perfect, gave them names relative to their perfections, and later made use of these same names to evoke them: from this came the Persian magic, which the Jews, having received by tradition during their captivity in Babylon, called _Kabbala_.[266] This magic became mixed with astrology among the Chaldeans, who regarded the stars as animated beings belonging to the universal chain of divine emanations; in Egypt, it became linked with the mysteries of Nature, and was enclosed in the sanctuaries, where it was taught by the priests under the safeguard of symbols and hieroglyphics. Pythagoras, in conceiving this spiritual hierarchy as a geometrical progression, considered the beings which compose it under harmonious relations, and based, by analogy, the laws of the universe upon those of music. He called the movement of the celestial spheres, harmony, and made use of numbers to express the faculties of different beings, their relations and their influences. Hierocles mentions a sacred book attributed to this philosopher, in which he called the divinity, the Number of numbers.[267] Plato, who, some centuries later, regarded these same beings as ideas and types, sought to penetrate their nature and to subjugate them by dialectics and the force of thought. Synesius, who united the doctrine of Pythagoras to that of Plato, sometimes called God, the Number of numbers, and sometimes the Idea of ideas.[268] The gnostics gave to the intermediary beings the name of Eons.[269] This name, which signifies, in Egyptian, a principle of the will, being developed by an inherent, plastic faculty, is applied in Greek to a term of infinite duration.[270] One finds in Hermes Trismegistus the origin of this change of meaning. This ancient sage remarks that the two faculties, the two virtues of God, are the understanding and the soul, and that the two virtues of the Eon are perpetuity and immortality. The essence of God, he said again, is the good and the beautiful, beatitude and wisdom; the essence of Eon, is being always the same.[271] But, not content with assimilating beings of the celestial hierarchy to ideas, to numbers, or to the plastic principle of the will, there were philosophers who preferred to designate them by the name of Words. Plutarch said on one occasion that words, ideas, and divine emanations reside in heaven and in the stars.[272] Philo gives in more than one instance the name of word to angels; and Clement of Alexandria relates that the Valentinians often called their Eons thus.[273] According to Beausobre, the philosophers and theologians, seeking for terms in which to express incorporal substances, designated them by some one of their attributes or by some one of their operations, naming them _Spirits_, on account of the